diff --git a/lib/contentTypeParser.js b/lib/contentTypeParser.js
index 10f4bff5f8..958c16ef5e 100644
--- a/lib/contentTypeParser.js
+++ b/lib/contentTypeParser.js
@@ -364,7 +364,7 @@ function removeAllContentTypeParsers () {
 function compareContentType (contentType, parserListItem) {
   if (parserListItem.isEssence) {
     // we do essence check
-    return contentType.type.indexOf(parserListItem) !== -1
+    return contentType.type.indexOf(parserListItem.type) !== -1
   } else {
     // when the content-type includes parameters
     // we do a full-text search
@@ -394,12 +394,21 @@ function compareRegExpContentType (contentType, essenceMIMEType, regexp) {
 function ParserListItem (contentType) {
   this.name = contentType
   // we pre-calculate all the needed information
-  // before content-type comparsion
+  // before content-type comparison
   const parsed = safeParseContentType(contentType)
-  this.type = parsed.type
+  this.isEssence = contentType.indexOf(';') === -1
+  if (parsed.type === '') {
+    if (this.isEssence === true) {
+      this.type = contentType.trim()
+    } else {
+      this.type = contentType.split(';')[0].trim()
+      this.isEssence = true
+    }
+  } else {
+    this.type = parsed.type
+  }
   this.parameters = parsed.parameters
   this.parameterKeys = Object.keys(parsed.parameters)
-  this.isEssence = contentType.indexOf(';') === -1
 }
 
 // used in ContentTypeParser.remove
diff --git a/test/content-parser.test.js b/test/content-parser.test.js
index d677ecfedb..62085fe6f7 100644
--- a/test/content-parser.test.js
+++ b/test/content-parser.test.js
@@ -649,3 +649,252 @@ test('content-type regexp list should be cloned when plugin override', async t =
     t.same(payload, 'png')
   }
 })
+
+test('allow partial content-type /1', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('json', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'image/jpeg'
+    },
+    body: ''
+  })
+})
+
+test('allow partial content-type /2', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('  json', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'image/jpeg'
+    },
+    body: ''
+  })
+})
+
+test('allow partial content-type /3', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('json  ', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'image/jpeg'
+    },
+    body: ''
+  })
+})
+
+test('allow partial content-type /4', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('  json  ', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'image/jpeg'
+    },
+    body: ''
+  })
+})
+
+test('allow partial content-type /5', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('json;', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'image/jpeg'
+    },
+    body: ''
+  })
+})
+
+test('content-type isEssence-check should use ParserListItem.type /1', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('   application/json', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+  fastify.addContentTypeParser('text/plain', function (request, body, done) {
+    t.fail('shouldn\'t be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+})
+
+test('content-type isEssence-check should use ParserListItem.type /2', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('application/json   ', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+  fastify.addContentTypeParser('text/plain', function (request, body, done) {
+    t.fail('shouldn\'t be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+})
+
+test('content-type isEssence-check should use ParserListItem.type /3', async t => {
+  t.plan(1)
+
+  const fastify = Fastify()
+  fastify.removeAllContentTypeParsers()
+  fastify.addContentTypeParser('   application/json   ', function (request, body, done) {
+    t.pass('should be called')
+    done(null, body)
+  })
+  fastify.addContentTypeParser('text/plain', function (request, body, done) {
+    t.fail('shouldn\'t be called')
+    done(null, body)
+  })
+
+  fastify.post('/', async () => {
+    return 'ok'
+  })
+
+  await fastify.inject({
+    method: 'POST',
+    path: '/',
+    headers: {
+      'content-type': 'application/json; foo=bar; charset=utf8'
+    },
+    body: ''
+  })
+})